The Ranger radio provides a variety of capabilities. To help you take advantage of those capabilities, the front panel controls are designed for convenience and ease of use. Their functions are described below.

1. RF LEDs indicate the amount of transmitted power. As the LEDs light across the scale, they show the relative power of your transmission signal.
2. S LEDs indicate the signal strength of the signal you are receiving. As the LEDs light across the scale, they show the relative power of the signal.
3. CLARIFIER is a fine tuning control. You can adjust a frequency - 500 Hz for best reception.
4. RESET is on the on/off control for the radio's backup voltage power. When this control is turned on, there is enough DC power to maintain any information you have saved in memory. Turn the control clockwise until you hear a click to turn on the backup power. If you turn this control off, anything saved in memory is erased. 
   SQ (squelch) is a second function of this control. Use it to silence the background (white) noise, to adjust the transceiver's ability to receive signals, and to control automatic scanning of the memory. Turn SQ clockwise to silence background noise. Turn SQ counterclockwise to increase the Ranger's ability to receive weaker frequencies. This control also starts and stops automatic scanning of frequencies saved in memory. Turn SQ clockwise to initiate automatic scanning; turn it counterclockwise to stop automatic scanning of memory (after pressing the MEMORY button).
5. MIC GAIN increases or decreases the power of the microphone amplifier circuit. To increase its gain, turn the control clockwise; to decrease gain, turn the control counterclockwise. For the optimum setting, press the PTT button and turn the control clockwise until all RF LEDs light. Then, turn the control counterclockwise until the last LED just starts to flicker.
   
   5A. ANL SWITCH -pull this knob to turn on automatic noise limiter.
   
6. RF GAIN adjusts the transceiver's sensitivity to both signals and background noise. It affects the distance at which you can receive a signal. Turn the control counterclockwise to reduce the Ranger's sensitivity. This is particularly useful in areas where there is a lot of congestion (many signals close together on the frequency range).
   
   6A. NB SWITCH -pull this knob to turn on noise blanker.
   
7. The frequency display consists of eight (8) numerical LEDs. It displays the frequency in use from 28.000.0 MHz to 29.999.9 MHz.